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Touch screen, touch panel, and display device having the same

a display device and touch screen technology, applied in the direction of electric digital data processing, instruments, computing, etc., can solve the problems of capacitance change, difficulty in changing the electric field between the detection column wiring and the detection row wiring according to touch of the pointer, etc., and achieve the effect of reducing the capacitan

Active Publication Date: 2013-04-04
TRIVALE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention aims to reduce the capacitance between bundles of wirings in both the column and row directions. This results in a reduction of inter-wiring capacitance, which can affect the performance of detection systems. By minimizing the number of intersection places between detection column and detection row wiring, the technology reduces the impact of capacitance on detection accuracy.

Problems solved by technology

However, for example, in a configuration in which capacitance (electric field coupling) between a bundle of wirings in a column direction and a bundle of wirings in a row direction is high, like a configuration in which the detection method discussed in Japanese Patent Application Laid-Open No. 2010-97536 is applied to the touch screen discussed in Japanese Patent Application Laid-Open No. 2010-61502, it is difficult for a change in an electric field between the detection column wiring and the detection row wiring according to touch of the pointer, such as a finger, i.e., a change in capacitance between row and column wirings, to occur.

Method used

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  • Touch screen, touch panel, and display device having the same
  • Touch screen, touch panel, and display device having the same
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Experimental program
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first preferred embodiment

[0029]FIG. 1 is a plan view schematically illustrating a configuration of a touch screen 1 included in a touch panel according to a first preferred embodiment of the present invention. Hereinafter, the configuration of the touch screen 1 according to the present preferred embodiment will be described with reference to, for example, FIG. 1. Further, reference numerals assigned to components described in the present preferred embodiment are assigned to components of second and third preferred embodiments that are the same or similar to such components.

[0030]As illustrated in FIG. 1, the touch screen 1 includes a base substrate 12 that is a transparent substrate formed of a transparent glass material or transparent resin, (1) a plurality of detection column wirings 2 extending in a column direction (corresponding to a y direction in FIG. 1), and (2) a plurality of detection row wirings 3 extending in a row direction (corresponding to an x direction in FIG. 1). Also, the plurality of de...

second preferred embodiment

[0101]In a second preferred embodiment of the present invention, shapes of the detection column wiring 2 and the detection row wiring 3 provided in the block areas C1, C2, R1, and R2 differ from those in the first preferred embodiment.

[0102]FIG. 15 is an enlarged view illustrating the vicinity of the grid A in the present preferred embodiment. Here, a plurality of (here 4) rectangular block areas C1, C2, R1, and R2 obtained by dividing the grid A are defined, only the detection column wiring 2 is provided in each of the block areas C1 and C2 (first block areas), and only the detection row wiring 3 is provided in each of the block areas R1 and R2 (second block areas), similar to the first preferred embodiment. Further, the block areas C1 and C2 in which the detection column wiring 2 is provided and the block areas R1 and R2 in which the detection row wiring 3 is provided are alternately arranged in the column direction y and the row direction x as a whole, and form a checker pattern....

third preferred embodiment

[0131]In the first and second preferred embodiments, each of the detection column wirings 2 provided in the block areas C1 and C2 constituting the grid A includes two sets of first and second zigzag wirings 2a and 2b, and each of the detection row wirings 3 provided in the block areas R1 and R2 constituting the grid A includes two sets of fifth and sixth zigzag wirings 3a and 3b. However, the sets of zigzag wirings included in each block area are not limited to two sets and three or more sets of zigzag wirings may be similarly used. In the present preferred embodiment, a configuration in which an odd number of sets (here, three sets) of zigzag wirings are included will be described.

[0132]FIG. 25 is an enlarged view illustrating the vicinity of the grid A in the present preferred embodiment. Here, a plurality of (here, 4) rectangular block areas C1, C2, R1, and R2 obtained by dividing the grid A are defined, similar to the first and second preferred embodiments. Only a detection colu...

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Abstract

A touch screen includes a base substrate, a bundle of rectangular wirings in a column direction including a plurality of detection column wirings that are electrically connected in common, and a bundle of rectangular wirings in a row direction including a plurality of detection row wirings that are electrically connected in common, the bundle of wirings being formed on the base substrate. Also, a plurality of block areas obtained by dividing an intersection area in which the bundle of wirings in the column direction and the bundle of wirings in the row direction intersect in a plan view are defined, and only the detection column wiring or only the detection row wiring is provided in each of the block areas.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a touch screen, a touch panel, and a display device having the same.[0003]2. Description of the Background Art[0004]In related art, a touch panel that detects touch of a pointer such as a finger and specifies coordinates of a touch position has attracted attention as excellent interface means. In this touch panel, various schemes such as a resistive scheme and a capacitive scheme have been discussed and commercialized.[0005]As a type of touch panel using the capacitive scheme, a touch panel using a projected capacitive scheme discussed in Japanese Patent Application Laid-Open (Translation of PCT Application) No. 9-511086 (1997) is known. In the touch panel of the projected capacitive scheme, even when a front side of a touch screen having a touch sensor embedded therein is covered with a protective plate such as a glass plate having a thickness of a few mm, touch of, for example, a finge...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G06F3/041
CPCG06F3/044G06F3/0445G06F3/0446
Inventor AGARI, MASAFUMINAKAGAWA, NAOKIONO, TAKESHIMORI, SEIICHIROMIYAYAMA, TAKASHIIMAMURA, TAKUJINAKAMURA, TATSUYA
Owner TRIVALE TECH